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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



David J. Keil, Family Editor and author, except as specified

Annual to tree
Leaves basal or cauline, alternate to whorled, simple to compound
Inflorescence: 1° inflorescence a head, each resembling a flower, 1–many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1–many per head
Flowers bisexual, unisexual, or sterile, ± small, of several types; calyx 0 or modified into pappus of bristles, scales, or awns, which is generally persistent in fruit; corolla radial or bilateral (rarely 0), lobes generally (0)4–5; stamens 4–5, anthers generally fused into cylinder around style, often appendaged at tips, bases, or both, filaments generally free, generally attached to corolla near throat; pistil 1, ovary inferior, 1-chambered, 1-seeded, style 1, branches 2, generally hair-tufted at tip, stigmas 2, generally on inside of style branches
Fruit: achene, cylindric to ovoid, generally deciduous with pappus attached
Genera in family: ± 1300 genera, 21,000 species (largest family of dicots): worldwide. Largest family in CA. Also see tribal key to CA genera: Strother 1997 Madroño 44(1):1–28. See glossary p. 25 for illustrations of general family characteristics.


Bruce G. Baldwin and Susan J. Bainbridge

Annual, generally ascending to erect, often black-glandular, generally ± purplish or brownish
Leaves alternate, generally linear to (ob)lanceolate, sessile, generally pinnately lobed, reduced upward
Inflorescence: heads generally radiate; involucre obconic to urn-shaped; phyllaries generally folded completely around ray fruit, falling with fruit, generally ± hairy; receptacle flat to slightly convex, chaff scales free, in ring between ray and disk flowers or throughout
Ray flowers (0)3–27; ligules white (often aging pinkish) to yellow, tubes hairy
Disk flowers 5–many; corollas yellow, puberulent; anther tips acute, long-tapered; style branches long, bristly
Fruit generally 2–5 mm, generally club-shaped, black; ray fruit compressed back to front, generally ± glabrous, pappus 0; disk fruit ± straight, generally ± hairy, pappus various
Species in genus: 14 species: w North America
Etymology: (George T. Lay, early 19th century English plant collector)
Reference: [Kyhos et al. 1990 Ann Missouri Bot Gard 77:84–95]


L. platyglossa (Fisch. & C.A. Mey.) A. Gray


Plant 3–70 cm, decumbent to erect, glandular, not scented
Leaves 4–100 mm, linear to (ob)lanceolate, sometimes fleshy; lower leaves lobed ± 1/2 to midvein
Inflorescence: peduncles < 13 cm; phyllaries 4–18 mm, basal margins interlocked by cottony hairs; chaff scales between ray and disk flowers
Ray flowers 5–18; ligules 3–20 mm, yellow, generally white-tipped
Disk flowers 6–124; corollas 3.5–6 mm; anthers generally purple
Fruit 2.5–7 mm; ray fruit dull; disk pappus of (0)14–32 bristles, 1–6 mm, whitish, generally scabrous throughout, not woolly on inner surface (in SW, rarely short-plumose below and woolly inside)
Chromosomes: 2n=14
Ecology: Common. Many habitats
Elevation: < 2000 m.
Bioregional distribution: Northwestern California, Great Central Valley, Central Western California, Southwestern California, w edge Mojave Desert
Flowering time: Mar–Jun
Synonyms: subsp. campestris D.D. Keck; L. ziegleri Munz, Ziegler's tidy-tips
Horticultural information: SUN: 1, 2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24.

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